Some studies have shown that red yeast rice reduces cholesterol levels, particularly LDL cholesterol; however, these studies did not last long enough to determine the long-term results of using red yeast rice, according to WebMD. Scientists need to conduct more research to identify the ideal dose of red yeast rice.
Scientists must also conduct additional studies to determine the efficacy of various brands of red yeast rice, states WebMD. Manufacturers use many different strains of yeast and fermentation types in the creation of red yeast rice supplements, leading to vastly varying levels of monacolin. Researchers believe monacolin is the most important ingredient in red yeast rice extract, so certain red yeast rice supplements may be more effective in reducing cholesterol than others.